The delay is over, you can now download the Google Voice app for the iPhone (requires users to be running Apple's iOS 3.1 or a later version). Kenneth Corbin provides the details:

After spending nearly a year and a half shut out of Apple's App Store, Google Voice has finally been allowed through the gate.

Google (NASDAQ: GOOG) has confirmed that Apple (NASDAQ: AAPL) has indeed approved a native version of the omnibus telephony tool for its App Store, bringing to a close a long standoff that formed a sturdy subplot in the intensifying rivalry between the two tech titans.

Google Voice promises an array of voice and messaging options, including low-cost international calling, searchable voicemail transcription and a consolidated, unique phone number that can forward calls to all of a user's devices.